Evidence for middle Triassic to Miocene dual subduction zones beneath the Shan-Thai terrane, western Thailand from magnetotelluric data

► Evidence of ancient subduction appears in the mid to lower crust beneath Shan-Thai. ► The conductive lower crust is interpreted as mafic granulites with 3% fluid. ► Two highly conductive zones are interpreted as mafic/ultramafic intrusions.